I am wondering if it would be bad if I started using propecia, rogaine, (minoxidil) or some other DHT blocker?

Start Hair Txs Early. If you're experiencing hair loss, the earlier you begin preventative medical treatment, the better. Once a follicle is "dead and gone" the only treatment to restore density is a hair transplant. All preventative treatments need to be continued over time in order to be effective (like your toothbrush!) so be prepared to commit to treatment & stick w/ it. Get a HairCheck measurement before starting!
Hair loss treatment. If you are losing your hair it would be a good time to start treating hair loss. Not everyone responds to medical treatments.